Changes to doc.

README.MD

@@ -1,4 +1,70 @@
+# JayTrax Library
 
 This is a port from C++ to C of Jaytrax replayer by Rhino https://github.com/rhinoid
 
 Current status: everything works except sample interpolation.
+
+
+Documentation can be found here: <doc_link>
+
+
+---
+
+## Lib jaytax API
+
+The following functions are exposed.
+
+### Init / Pre-processing
+
+```c
+
+void jaytrax_loadSong(
+JT1Player* THIS,
+JT1Song* sng
+
+);
+```
+
+### Track Player commands.
+
+```c
+void jaytrax_playSubSong(
+JT1Player* THIS,
+int subsongnr
+);
+```
+
+```c
+void jaytrax_stopSong(
+JT1Player* THIS
+);
+```
+
+```c
+void jaytrax_pauseSong(
+JT1Player* THIS
+);
+```
+
+```c
+//rename to resume?
+void  jaytrax_continueSong(
+JT1Player* THIS
+); 
+```
+
+### Internal (for now)
+
+```c
+void  jaytrax_setInterpolation(JT1Player* THIS, uint8_t id);
+```
+
+```c
+JT1Player* jaytrax_init();
+```
+
+```c
+void  jaytrax_renderChunk(JT1Player* THIS, int16_t* renderbuf, int32_t nrofsamples, int32_t frequency);
+```
+
+---